C++ Program Structure

                                C++ Program  Structure

Structure of C++ Program : Layout of C++ Program  :

C++ programming language is most popular language after C programming language.

C++ is first object orianted Programming language. We have summarize of C++ program inthe following Picture  - 

                                                                 Structure of C++ Program

Section 1 : Header File Declaration Section :

• Header files used in the program are listed here.

• Header file provides Prototype declaration for different library Functions.

• We can also include User Define Header File.

• Basically all preprocessor directives are written in this section.

Section 2 : Global Declaration Section :

1. Global Variables are declared here.
2. Global Declaration may include - 

•  Declaring Structure
•  Declaring Class
•  Declaring Variable

Section 3: Class Declaration Section :

• Actually this section can be considered  as sub section for the global declaration section.

• Class declaration and all method of that class are defined here.

Section 4 : Main Function  :

• Each and every C++ program always starts with main fuction.

• This is entry point for all the function, Each and every method is called indirectly through main.

• We can created class objects in the main.

• Operating system call this function automatically.

Section 5 : Method Defination section :

• This is optional section, Generally this method was used in C Programming